I've had a go at a few and failed cos some tit ALWAYS cuts your path either just as you're getting a good speed so you have to slow down and go back or just as you approach it so you fly off the bike. I can see myself getting very angry by these.
Edited 100% Checklist
Story Missions - 60%
Complete all 90 Story Missions.
Complete 4 Procedural Missions - 8%
Little Jacob's Drug Delivery - 2%
Brucie's 10 Car Exports - 2%
Brucie Races - 2%
Assassinations - 2%
Car Thefts - 2%
Deliver all 30 vehicles to the garage.
Friends - 10%
Open all unique abilities and complete all activities and get their Like to 100% (except for Roman & Dwayne).
Activities - 5%
Beat computer or Friend at all activities once:
Darts vs friend or computer win - 1.25%
Bowling vs friend in a FULL round win - 1.25%
Pool vs friend or computer win - 1.25%
QUB3D beat high score - 1.25%
Random Characters - 5%
Find all the RCs and complete their encounter missions (except Jeff, Cherise Clarence & Ivan)
Most Wanted - 2.5%
Kill all 30 PEDs on list
Vigilante - 2.5%
Complete 20 crimes (don't need to be done continuously)
Flying Rats - 2.5%
Find all 200 pigeons.
Unique Stunt Jumps - 2.5%
Complete all 50 jumps.
Total = 100%